JP2526468Y2 - Disc player loading mechanism - Google Patents

Description

The present invention relates to a disc player such as a compact disc player and, more particularly, to a disc loading mechanism capable of loading several types of discs having different diameters into the player. It is.

(B) Conventional technology In recent years, a compact disc having a diameter of 8 cm has been developed in addition to a conventional compact disc having a diameter of 12 cm.
Such a disk has no difference in the way of recording information at all compared to a conventional 12 cm diameter disk, and merely has a smaller diameter, so that the motor control circuit of the motor for driving the turntable is slightly modified. Only by changing (this is based on the difference of the moment of inertia of the disk), it is possible to selectively reproduce.

In a stationary compact disc player, a tray that moves horizontally inside and outside the player is generally provided, and the disc is accommodated in a concave portion having a diameter smaller than that of the disc formed on the upper surface of the tray, so that the disc extends over the inside and outside of the player. Transported. A lifter for lifting and lowering the disk is disposed in the recess so that the disk can be immersed therein. The disk is placed on the lifter during the transportation. The disc mounted on the lifter in this way has its center hole accurately positioned on the turntable in the player at the tray carry-in position, and then the lifter is immersed on the turntable. It is lowered and placed. At this time, the disc is pressed against the turntable because the clamper presses the upper surface of the disc.

When such an 8 cm diameter disc is reproduced by such a player, there is a problem in that the disc must be mounted on a turntable first. That is, in the above player, since the concave portion is formed in a circular shape having a diameter smaller than that of the 12 cm diameter disc, in the case of a 12 cm diameter disc, the disc is simply stored in the concave portion, and the center of the disc and the concave portion can be aligned. This is possible, and when the tray is loaded, the disc is automatically centered with respect to the turntable.However, in the case of an 8 cm disc, the disc diameter is much smaller than the diameter of the recess, so the disc It is difficult to align the center with the recess, and even if the center is adjusted well, the disk may shift sideways when the tray is moved. For this reason, the disk is positioned directly above the turntable when loading the tray. Therefore, the disc could not be placed on the turntable satisfactorily.

As means for solving such a problem, there is one disclosed in Japanese Utility Model Laid-Open No. 59-16538 (G11B17 / 04). That is, a plurality of steps are provided on the lifter, and disks of respective diameters are engaged with the steps to perform centering of the disks. However, in such a device, since the outer circumference of the disk and the stepped portion are engaged with the disk of all diameters, the diameter of the lifter is large when the difference between the diameters of the disks is large, such as 12 cm diameter and 8 cm diameter. There is a disadvantage that the length in the direction is increased. Also, in this case, if the length of the step is increased in accordance with the difference in the diameter of the disk, the contact portion of the disk placed on this step with the step becomes large in the inner circumferential direction of the disk, and There was a fear that the information recording surface of the disc might be damaged. On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 60-93664 (G11B17 / 04), by inclining the step in the inner circumferential direction, the step can be prevented from contacting the information recording surface of the disk. The problem remains that the length of the lifter in the radial direction is still large, and because of the length of the step, trying to obtain a slope that avoids contact with the disk surface, the height of the slope There is a problem that the dimension occupied in the direction increases, and as a result, the dimension in the height direction of the lifter increases.

(C) Problems to be solved by the present invention The present invention does not provide a loading mechanism for a disc player that can load several kinds of discs with a simple configuration and can prevent the information recording surface of the disc from being damaged. It is assumed that.

(D) Means for Solving the Problems In view of the above problems, the loading mechanism of the present invention moves horizontally between a disk loading / unloading position carried out of the player main body and a disk reproducing position carried in the player main body. A tray for transporting a disk, a concave portion for storing a disk formed on the upper surface of the tray and having a diameter slightly larger than the diameter of the disk, and at least three lifters arranged to be immersed in the concave portion and for mounting the disk The lifter has a step formed on the center side of the recess, and the lifter is provided at the bottom of the step with a slope gradually lowering toward the center of the recess, and on the upper surface of the lifter. Damage prevention member made of synthetic leather or the like provided,
A large-diameter disk is mounted on the lifter via the damage prevention member, and a small-diameter disk is mounted on the lifter with its peripheral edge in contact with the inclined portion of the step portion. It is characterized by comprising.

(E) Action The large diameter disk is centered by being housed in the recess for accommodating the disk, and is placed on a damage prevention member made of synthetic leather or the like arranged in accordance with the upper shape of the lifter. At this time, since the disc is in contact with the damage prevention member, there is no fear that the information surface of the disc is damaged. Further, the small diameter disc is engaged with the step portion at its peripheral edge, and is centered with respect to the disc storage recess by the inclined portion. At this time, since the inclined portion is gradually inclined downward toward the center of the concave portion, a small-diameter disc is supported by the peripheral edge of the disc abutting on the stepped inclined portion, and the inclined portion and the information surface of the disc are supported. There is no danger that the information side of the disc will be damaged.

(F) Example Hereinafter, an example of the present invention will be described.

In the perspective view and the exploded perspective view of FIG. 1 and FIG.
The tray (1) has a circular recess (2) formed on its upper surface for storing a disk. This recess (2)
Has a diameter slightly larger than the diameter of the large diameter disc (12 cm diameter disc). In the recess (2), a notch (3) is formed to allow movement of a turntable (not shown) and a pickup (not shown), and lifters (4) and (4) for lifting and lowering a disc are provided. (4) Through holes (5), (5), (5) and (5) from which (4) protrude are formed. Further, through holes (6) (6) for lifting and lowering the lifter are formed in the upper surface of the tray (1).

The lifters (4), (4), (4), and (4) are paired with the tray (1) about the axis (7) (7).
The levers (8) and (8), which are rotatably mounted on the shaft, are integrally formed. These levers (8) and (8) are urged by spring means (not shown) so that the lifters (4), (4), (4), and (4) project into the recess (2). Furthermore, projections (9) and (9) are formed on the upper surfaces of the levers (8) and (8), respectively. When the levers (8) and (8) are mounted, the projections (9) and (9) are attached to the tray (1). Through-hole on top (6)
(6) Face the outside.

FIG. 3 shows the upper shape of the lifter (4a). Such a lifter (4a) has a step (10) on the inside of the tray (1) on the upper side.
Is formed at the bottom of the step portion (10), and an inclined portion (10a) which is gradually inclined toward the center of the concave portion (2) is formed. A pad (11) made of stamped synthetic leather (for example, Exaine (registered trademark)) or the like is attached to the upper portion of the lifter (4a). The remaining lifters (4) (4) (4) also have steps (10) (10) (1
0) is formed and pads (11) (11) (11)
The bottom of each step (10), (10), (10) has a slope (10a), (10a), (10a) that is gradually lowered toward the center of the recess (2). Is formed.

The large-diameter disc is stored in the recess (2), and is placed on the tray (1) in a state of being centered and positioned in the recess (2). At this time, the large-diameter disc is attached to the upper part of the lifter (4a) (4a) (4a) (4a) to prevent damage to the disc (11) (11) (11)
Since it is placed on the lifters (4a), (4a), (4a), and (4a) via (11), damage to the disc information surface is prevented. Further, after the tray (1) is carried into the player, the lifters (4), (4), (4), and (4) are immersed, so that the tray (1) is placed on a turntable (not shown). still,
The immersion of the lifters (4), (4), (4) and (4) is achieved by a clamper (not shown) which presses the disc to the turntable, that is, when the clamper is displaced in the direction of the turntable, it is arranged on the clamper. Pin (not shown)
Pushes down the projections (9) and (9) of the levers (8) and (8) through the through holes (6) and (6) on the upper surface of the tray (1), and attaches the levers (8) and (8) with spring means. The lifters (4), (4), (4), and (4) are immersed in such a manner as to rotate against the force.

In addition, the small-diameter disc can be a lifter (4) (4)
(4) The peripheral edge of the step (10), (10), (10), (10) is engaged with the step (4) and is placed on the inclined portion, so that the center is centered in the concave portion (2) in a horizontal state. Is positioned. At this time, the small-diameter disk (D ₂ ) is
Since the inclined portions (10a), (10a), (10a), and (10a) are formed at the bottom of the step portion, only the periphery of the small-diameter disk (D ₂ ) is supported by contacting the inclined portion. Accordingly, the information surface of the disk (D2) is not inclined (10a) (10a) (10a) (1
0a) is not contacted, so that damage is prevented.

FIG. 5 is a view showing the arrangement of the lifters (4), (4), (4), and (4). As shown, lifter (4) (4) (4)
(4) is positioned at an angle θ with respect to the loading direction of the tray (1). Such an angle is large disc (D ₁ )
It is preferably about 60 ° from the viewpoint of stable support of the small-diameter disk (D ₂ ) and combination with the notch (3).

As mentioned above, although one Example of this invention was described, this invention is not limited to such an Example, A various change is possible. For example, as shown in FIG. 6, the lifters (4 ') (4') (4 ') (4') may be formed of a rubber member to prevent the disk surface from being damaged.

(G) Effect of the Invention As described above, according to the present invention, a disk having a large diameter is accommodated in a concave portion for accommodating the disk so that the center is aligned, and a synthetic leather or the like arranged in accordance with the upper shape of the lifter is used. Is mounted on the lifter via the damage prevention member. At this time, since the disc is in contact with the damage prevention member, there is no fear that the information surface of the disc is damaged. Further, the small diameter disc is engaged with the step portion at its peripheral edge, and is centered with respect to the disc storage recess by the inclined portion. At this time, since the inclined portion is gradually inclined downward toward the center of the concave portion, the disc having a small diameter is placed on the lifter with its peripheral edge abutting on the inclined portion of the step portion. Further, since the inclined portion is separated from the information surface of the disk, there is no fear that the information surface of the disk is damaged. Therefore, discs of several diameters can be loaded with a simple structure, and damage to the disc surface can be prevented at the same time, so that the practical effect is large.

[Brief description of the drawings]

1 shows an embodiment of the present invention, FIG. 1 is a perspective view of a tray, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a perspective view of an upper portion of a lifter, and FIG. FIG. 5 is a top view of the tray, and FIG. 6 is a perspective view showing another embodiment. (1) ... tray, (2) ... recess, (4) (4 ') ...
... lifter, (10) ... step, (11) pad ... (damage prevention means).

Claims (1)

(57) [Scope of request for utility model registration] A tray for horizontally moving a disc between a loading / unloading position of the disc carried out of the player main body and a reproducing position of the disc carried in the player main body; A disc storage recess having a diameter slightly larger than the diameter of the disc, and at least three lifters arranged to be immersed in the recess and mounting the disc, wherein the lifter is located at the center of the recess. A step portion is formed on the side, and at the bottom of the step portion, an inclined portion which is gradually inclined toward the center of the concave portion,
A damage prevention member made of synthetic leather or the like disposed on the upper surface of the lifter, a large-diameter disk is placed on the lifter via the damage prevention member, and a small-diameter disk has a peripheral edge. A loading mechanism for a disc player, wherein the loading mechanism is configured to be placed on the lifter in a state where the loading mechanism is in contact with an inclined portion of the step portion.